Nice explanation chrisjo!
Here is a video of a steam engine converted to run on compressed air. It is a popcorn steam engine model but the principle is the same for a full size steam locomotive.
https://m.youtube.com/watch?v=qQLsWoAjKOo
Here is a video of a steam engine converted to run on compressed air. It is a popcorn steam engine model but the principle is the same for a full size steam locomotive.
https://m.youtube.com/watch?v=qQLsWoAjKOo